Look up Dawrin's theory of evolution. Basically, fossil records show how life forms change over time through evolution.
Answer:
Dead zones are hypoxic (low-oxygen) areas in the world's oceans and large lakes, caused by "excessive nutrient pollution from human activities coupled with other factors that deplete the oxygen required to support most marine life in bottom and near-bottom water. (NOAA)".
Explanation:
Physical change. Boiling water does not change the fundamental properties of the water, as it can turn back into water during condensation.
Answer:
A. Carotene
Explanation:
It is an orange/red pigment which is seen during the fall.
Answer:
A. carbon dioxide and water